1. Mitosis and Meiosis

2. Mitosis Division of the nucleus Also called karyokinesis
-division of somatic (body) cells
Division of the nucleus
Also called karyokinesis
Only occurs in eukaryotes
Has four stages
Doesn’t occur in some cells such as brain cells

3. Mitosis
Interphase
Prophase
Metaphase
Anaphase
Telophase

4. Interphase Interesting things happen! Cell preparing to divide
Genetic material doubles

5. Prophase Chromosome pair up! Chromosomes thicken and shorten
-become visible
-2 chromatids joined by a centromere
Centrioles move to the opposite sides of the nucleus
Nucleolus disappears
Nuclear membrane disintegrate

7. Metaphase Chromosomes meet in the middle!
Chromosomes arrange at equator of cell
Become attached to spindle fibres by centromeres
Homologous chromosomes do not associate

10. Anaphase Chromosomes get pulled apart
Spindle fibres contract pulling chromatids to the opposite poles of the cell

11. Telophase Now there are two! Chromosomes uncoil
Spindle fibres disintegrate
Centrioles replicate
Nucleur membrane forms
Cell divides